US5669512A - Inject-eject system for rack mounted plug-in modules - Google Patents
Inject-eject system for rack mounted plug-in modules Download PDFInfo
- Publication number
- US5669512A US5669512A US08/369,070 US36907095A US5669512A US 5669512 A US5669512 A US 5669512A US 36907095 A US36907095 A US 36907095A US 5669512 A US5669512 A US 5669512A
- Authority
- US
- United States
- Prior art keywords
- front panel
- ejection
- injecting
- mainframe
- printed circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000002347 injection Methods 0.000 claims abstract description 46
- 239000007924 injection Substances 0.000 claims abstract description 46
- 238000003780 insertion Methods 0.000 claims abstract description 13
- 230000037431 insertion Effects 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 238000000605 extraction Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 14
- 230000008569 process Effects 0.000 abstract description 11
- 229910000831 Steel Inorganic materials 0.000 abstract 1
- 239000010959 steel Substances 0.000 abstract 1
- 229910052782 aluminium Inorganic materials 0.000 description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 7
- 210000004905 finger nail Anatomy 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- -1 aluminum Chemical class 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000006071 cream Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000007514 turning Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/14—Mounting supporting structure in casing or on frame or rack
- H05K7/1401—Mounting supporting structure in casing or on frame or rack comprising clamping or extracting means
- H05K7/1402—Mounting supporting structure in casing or on frame or rack comprising clamping or extracting means for securing or extracting printed circuit boards
- H05K7/1409—Mounting supporting structure in casing or on frame or rack comprising clamping or extracting means for securing or extracting printed circuit boards by lever-type mechanisms
Definitions
- printed circuit boards are often interconnected in card cages or mainframes that include mounting hardware and electrical connections for receiving the printed circuit boards.
- a typical system is a VXI mainframe and corresponding printed circuit (PC) board modules, which have been standardized by the VXI Consortium recommendations for interchangeability between different vendors.
- the printed circuit boards are housed in modules which are slidably received by the mainframes with the electrical connection being made by electrical plug-in connectors at the back of the printed circuit boards and corresponding electrical connections in the mainframe.
- two handles are mounted on the front panel of the plug-in module to permit the plug-in module to be manually pushed-in and pulled-out of the mainframe connectors.
- This brute force method of injection/ejection can damage the mainframe, the module or the electrical connectors. It is also a difficult process if the mainframe is not against a supporting wall or is on wheels.
- plug-in modules can have between 96 and 320 electrical connection pins which correspond to an injection/ejection force of approximately 24 to 75 pounds.
- ejectors have been mounted on the front panel of some types of plug-in modules as an aid in extracting the printed circuit board plug-in modules from the electrical connectors of the mainframes.
- VXI mainframes a common extruded aluminum surface is conventionally provided on the mainframe adjacent to the front panel of the plug-in module to function as a fixed ejection surface for any ejector mounted to the front panel of the module.
- a typical prior art ejector facilitates the removal of the module by using a pivoting lever arm to bear against the fixed ejection surface and reduce the force necessary to be applied by the user.
- Existing ejectors typically consist of several components which must be assembled and attached to the mainframe or, in some cases, to the printed circuit board. There are typically two ejectors on each printed circuit board module, one adjacent to each end of the front panel, to permit ejection of the module without skewing or twisting the PC board.
- One such ejector is disclosed in U.S. Pat. No. 4,603,375 to Miller et al, which patent is hereby incorporated herein by reference for all that it discloses.
- Some ejector systems have been developed in which the ejector lever is also capable of injector operation.
- One type of system for accomplishing both injection and ejection involves use of a member which is pivotally mounted on the circuit board, and which includes a single finger that extends into a receiver such as a notch in the adjacent frame of the mainframe. This type of configuration typically creams excessive fatigue problems on that single finger, since that single component is stressed in one direction upon insertion, and in the other direction upon ejection.
- FIGS. 1 and 2 illustrate a pair of injector/ejectors 10A and 10B as components of a system including printed circuit board plug-in module 12 having a front panel 14 secured to one end of the plug-in module 12 in an orthogonal relationship.
- Two longitudinally-slotted openings 11A and 11B in the front panel 14 permit the pivotal movement of injector/ejectors 10A and 10B.
- Module 12 has an electrical connector 16 having shrouded male pins 18 extending outwardly therefrom, two such electrical connectors 16 are illustrated in FIG. 1 that are arranged adjacent opposite corners of module 12 and adjacent the inner edge thereof.
- the configuration of the mainframe chassis includes a common surface 24 that functions as an ejection bearing surface for extracting the electrical connectors 16 from the electrical connectors 22.
- the ejection bearing surface 24 is arranged behind the front panel 14 of the module when the four electrical connectors 16 and 22 are interconnected.
- Ejection bearing surface 24 is behind front panel 14 at the top and bottom thereof, providing an ejection bearing surface for both injector/ejectors 10A and 10B.
- an injection bearing surface 26 is also provided on an inner surface of the mainframe chassis, adjacent to the forward end of plug-in module 12, at both top and bottom.
- Injector/ejectors 10A and 10B function in response to a pivoting force applied thereto, which force is transmitted to the ejection bearing surface 24 to cause the plug-in module 12 to be moved outwardly from the electrical connectors 22 in response thereto.
- a pivoting force applied thereto which force is transmitted to the ejection bearing surface 24 to cause the plug-in module 12 to be moved outwardly from the electrical connectors 22 in response thereto.
- ejection surface 34 of ejection finger 32 contacts ejection bearing surface 24, transmitting the pivotal force and causing connectors 16 of plug-in module 12 to be disengaged from connectors 22.
- injection finger 36 Also extending from the base of lever handle 30 in a downwardly direction spaced from ejection finger 32 is an injection finger 36.
- the lower forward portion of injection finger 36 defines a ridge that extends generally in the direction of the ejection surface 34, and forms an injection surface 38.
- the injection bearing surface 38 contacts injection bearing surface 26, and communicates forces from the lever handle 30 through the injection finger 36 and injection surface 38 to the injection bearing surface 26 during injection of the plug-in module 12 into the mainframe chassis.
- Freehauf's system further teaches two elongated apertures in the front panel 14 of the plug-in module to accommodate the two injector/ejector levers 10A and 10B.
- the apertures and the levers extend approximately 7.7-8.0 mm from the panel edge, thus limiting the useful area of the front panel to approximately 22.3-22.0 mm.
- This can be problematic as today's plug-in module front panels are often crowded with electrical components, including connector pins that are also placed on the front of the P.C. board plug-in modules to accommodate the connection of terminal cards, inputs and outputs, or other electrical interconnections beyond those provided at the back of the mainframe.
- the space on the front panel is necessary for electrical connectors which now contain upwards of 300 pins.
- Freehauf's injection/ejection system also requires 6 additional components beyond the front panel and the circuit board to be manufactured and assembled. This is a costly solution both in the cost of the components and the cost of assembly/disassembly.
- the present invention comprises an improved injector/ejector system in which the number of components are reduced over the systems of the prior art and the injecting and ejecting operations are effectuated by components separately spaced from the lever and made of such material and in such a manner to thereby increase the durability of the system and reduce the stress, wear, and galling that occurs to the stress bearing surfaces of the prior art solutions.
- the present invention also increases the useable panel space and improves the ease of use over the injection/ejection system of the prior art.
- the injector/ejector system of the present invention may be utilized in any currently specified VXI printed circuit board plug-in module system and other electronic plug-in module system.
- the present invention may comprise an injector/ejector defined by a unitary lever arm and two finger extensions oppositely situated and which is attached to a front panel of a circuit board proximate to an exterior corner of the circuit board.
- the lever is attached with a shoulder screw assembly comprised of a screw, bearing, and friction spring to a corner shaped mounting block positioned on the opposite side of the circuit board.
- the finger that actuates the ejection process operates through an aperture in the front panel that is situated proximate to the notched edge and the outside corner of the front panel.
- the ejection finger is also formed in such a manner that approximately 17 degrees of rotation is permitted before the ejection bearing surface of the mainframe is engaged, thus permitting the operator to obtain leverage under the lever before the ejection process begins.
- the extension finger that actuates the injection process remains on the interior side of the front panel, its exposure to the outside being unnecessary for effective operation.
- FIG. 1 shows a perspective illustration of a prior art printed circuit board plug-in module showing the printed circuit board disengaged from the electrical connector of the mainframe;
- FIG. 2 shows an enlarged view of a prior an type of plug-in module injector/ejector lever as illustrated in FIG. 1;
- FIG. 3 shows a side cut-away view of a printed circuit board plug-in module fully inserted into a mainframe according to the present invention
- FIG. 5 shows a front panel of a printed circuit board plug-in module according to the present invention
- FIG. 6 shows a first and a second embodiment of the present invention, one for a typical printed circuit board plug-in module and the other for a printed circuit board plug-in module adapted to accommodate a mass termination card;
- FIG. 9 shows a second side perspective view of an injection/ejection lever according to the present invention.
- FIG. 10 shows a first side view of an injection/ejection lever according to the present invention
- FIG. 11 shows a second side view of an injection/ejection lever according to the present invention.
- FIG. 12 shows a rear view of an injection/ejection lever according to the present invention.
- FIG. 13 shows a front view of an injection/ejection lever according to the present invention.
- FIGS. 3-5 illustrate a pair of inject/eject levers 110A and 110B as components of a system including a printed circuit pug-in module 112 having a front panel 114 secured to one end of the plug-in module 112 in an orthogonal relationship therewith.
- Two notches 111A and 111B and slots 113A and 113B are provided on opposite ends along one side of front panel 114 to permit the pivotal movement of inject/eject levers 110A and 110B.
- module 112 is slid along the mainframe guides (not shown) until it reaches the position slightly beyond that shown in FIG. 4.
- the operator applies a pivotally downward force on lever arm 130A toward the front panel 114 and simultaneously applies a pivotally upward force on lever arm 130B toward the front panel 114 until the electrical connectors (not shown) of the module 112 are engaged with the electrical connectors (not shown) of the mainframe 120 and the inject/eject levers 110A and 110B reach the configuration as shown in FIG. 3.
- the operator inserts his/her fingers under the grasping surface 180A of lever arm 130A and the grasping surface 180B of lever arm 130B (the levers 110A and 110B are in the configuration as shown in FIG. 3).
- the lever of the present invention has an angled surface at the end of the lever arm 130 (FIGS. 7-11) in order to enable the operator to slide his/her fingertip under the lever without having to pry the lever up with his/her fingernail or some other substantially flat object, such as a screw driver blade, which can damage the front panel.
- FIG. 5 shows a front view of front panel 114 which illustrates notches 111A and 111B that are in one side of front panel 114 and extend approximately 4 mm toward the center of front panel 114.
- Slot 113A is laterally adjacent and vertically above notch 111A effectuated to receive eject finger 132A of lever 110A.
- Slot 113B is similarly placed laterally adjacent and vertically below notch 111B effectuated to receive eject finger 132B of lever 110B.
- Slots 113A and 113B are approximately 4.45 mm wide (represented by letter C in FIG. 5) by 15.07 mm in length (represented by the letter D in FIG. 5) and are approximately 4.24 mm from the top and bottom edges, (E in FIG.
- notches 111 and slots 113 toward the farthest extreme corners of the front panel permit as much area as possible on the front panel to be used for electrical connections and graphical markings, which is becoming more and more important, especially as front terminal cards (shown in FIG. 6) are now capable of having more than 300 electrical connections, with the major present limitation being available space to accommodate the connections and wires.
- FIGS. 3-6 illustrate an embodiment having two inject/eject levers 110A and 110B at opposing ends of front panel 114.
- the present invention contemplates an embodiment comprising only one inject/eject lever, albeit an inferior embodiment in terms of mechanical advantage and stresses on module 112.
- the two inject/eject levers 110A and 110B are mirror images of each other in configuration and operation. Thus, a detailed description of inject/eject lever 110B will be sufficient to appreciate both inject/eject levers.
- FIG. 7 The interrelationship between the components of the inject/eject system that are mounted on the plug-in module 112 is illustrated in FIG. 7. Specifically, a preassembled screw 150 with bearing and friction spring 153 is inserted into the pivot aperture 140 of inject/eject lever 110B, inserted through module aperture 154 and is screwed into threaded aperture 156 in support block 158. A screw 162 is inserted through aperture 164 in front panel 114 and screwed or otherwise secured in aperture 165 of support block 158.
- lever arm 130 When inject/eject lever is secured to module 112 and front panel 114, lever arm 130 will extend through notch 111B and eject finger 132 will extend through slot 113B.
- the rest of the inject/eject lever 110B will be on the opposite side of front panel 114. This configuration will permit inject/eject lever 110B to pivot about the pivot aperture 140 whilst using the fewest number of components and taking up the least amount of useable area on the front panel and on the printed circuit module 112.
- lever 110B comprises a lever arm 130 that has a width (H in FIG. 12) of approximately 3.2 ⁇ 0.25 mm and a thickness of approximately 2.0 ⁇ 0.25 mm at its tip.
- An upper side surface 183 of lever arm 130 remains relatively flat, while the lower side grasping surface 180 angles away from surface 183 (I in FIG. 10) at approximately 14° ⁇ 0.5° starting from a first end 202 and reaching a final thickness (J in FIG. 11) of approximately 4.77 ⁇ 0.25 mm at a middle portion 204 before angling back down to approximately 3.2 ⁇ 0.25 mm at a second end 206 (K in FIG.
- a ledge 181 traverses the perimeter of the lever arm 130 on a first side of the end of said lever arm 130 (see FIGS. 9 and 11-13).
- the ledge 181 is approximately 0.4 ⁇ 0.25 mm in height (M in FIG. 13) and 1.0 ⁇ 0.25 mm thick (N in FIG. 11).
- lever arm 130 As the lever arm 130 reaches the pivotal axis portion of the lever 110B, it becomes a circular boss 141 having an outside diameter (O in FIG. 11) of approximately 10.32 ⁇ 0.25 mm and being raised on the first side (Q in FIG. 12) by approximately 3.51 ⁇ 0.25 mm.
- a first hole 143 is bored completely through the lever with the center of pivot aperture 140 having a diameter of approximately 5.3 ⁇ 0.038 mm (R in FIG. 10).
- a second hole 145 is bored from the second side of said lever to a depth of 3.31 ⁇ 0.076 mm with the same center as the first hole, having a diameter (S in FIG. 10) of approximately 6.85 ⁇ 0.038 mm. This creates pivot aperture 140 that houses the bearing 150 and a bore area 145 that houses the screw head 153 and spring assembly when assembled (FIGS. 8 and 10).
- Ejection finger 132 extends approximately 13.6 ⁇ 0.25 mm from the center of pivot aperture 140 (T in FIG. 13) at approximately a 55° angle (U in FIG. 11) from the lever arm 130 attached to the opposite side of the boss 141 (FIGS. 10 and 11).
- Injection finger 136 extends approximately 10.5 ⁇ 0.25 mm from the center of pivot aperture 140 (V in FIG. 12) at approximately a 164° angle from the lever arm 130 attached to the opposite side of the boss 141 (FIGS. 10 and 11).
- Lever 110 is preferably manufactured by a stainless steel metal-injection-molded process.
- the stainless steel will minimize galling of the injection and ejection bearing surfaces, both on the lever 110 and on the mainframe 120.
- any hard material could be used, including metals such as aluminum, and any known manufacturing process could be utilized such as machining or metal extrusion.
- the lever be made of a material different from that of the injection and ejection bearing surfaces of the mainframe, in order to minimize the possibility of galling on either surface.
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Mounting Of Printed Circuit Boards And The Like (AREA)
Abstract
Description
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US08/369,070 US5669512A (en) | 1995-01-05 | 1995-01-05 | Inject-eject system for rack mounted plug-in modules |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/369,070 US5669512A (en) | 1995-01-05 | 1995-01-05 | Inject-eject system for rack mounted plug-in modules |
Publications (1)
Publication Number | Publication Date |
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US5669512A true US5669512A (en) | 1997-09-23 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US08/369,070 Expired - Fee Related US5669512A (en) | 1995-01-05 | 1995-01-05 | Inject-eject system for rack mounted plug-in modules |
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US (1) | US5669512A (en) |
Cited By (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6003689A (en) * | 1998-03-18 | 1999-12-21 | 3Com Corporation | PCB ejector cage assembly |
US6147872A (en) * | 1999-02-08 | 2000-11-14 | Excel Switching Corporation | Injector/ejector machanism for printed circuit cards |
US6160717A (en) * | 1999-02-24 | 2000-12-12 | Cisco Technology Inc. | Integrated retention spring with card ejector |
WO2001047331A1 (en) * | 1999-12-22 | 2001-06-28 | Rittal Electronic Systems Gmbh & Co. Kg | Operating element with on and/or off lever piece for printed circuit boards |
US6285548B1 (en) | 2000-08-18 | 2001-09-04 | Quantum Bridge Communications, Inc. | Face plate for a chassis for high frequency components |
US20020089821A1 (en) * | 2000-11-10 | 2002-07-11 | Acard Technology Corporation | Automated disk-ejection apparatus and disk array having the same |
US6496379B2 (en) * | 2001-03-02 | 2002-12-17 | Sun Microsystems | PC board ejector assembly and method for use |
US20030030993A1 (en) * | 2001-08-10 | 2003-02-13 | Kitchen James Robert | Module ejection mechanism |
GB2379092A (en) * | 2001-08-10 | 2003-02-26 | Sun Microsystems Inc | Ejection/injection lever for computer module |
US6530802B2 (en) * | 2001-02-12 | 2003-03-11 | Berg Technology, Inc. | Latch and release mechanism for an electrical connector |
US20030207605A1 (en) * | 2002-05-03 | 2003-11-06 | Compaq Information Technologies Group, L.P. | Self-locking mechanism for a hot pluggable printed circuit board |
US20040077198A1 (en) * | 2002-09-30 | 2004-04-22 | Schlack Richard E. | PC board ejector lever |
US20040219811A1 (en) * | 2003-04-29 | 2004-11-04 | International Business Machines Corporation | Apparatus for positioning an electrical assembly within a housing |
US20040246695A1 (en) * | 2003-06-09 | 2004-12-09 | Schlack Richard E. | Compact PCI ejector latch |
US20040257784A1 (en) * | 2001-02-05 | 2004-12-23 | George Dalisay | Apparatus for circuit board insertion-extraction |
US20050088825A1 (en) * | 2003-10-22 | 2005-04-28 | Hewlett-Packard Development Company, L.P. | Computing device module |
US20050136715A1 (en) * | 2003-12-17 | 2005-06-23 | Schlack Richard E. | Ejector latch with double catch |
US20060050184A1 (en) * | 2004-09-09 | 2006-03-09 | General Instrument Corporation | Hot/cold swappable consumer based tuner/demod/fec module |
US20150016877A1 (en) * | 2012-04-25 | 2015-01-15 | Telefonaktiebolaget L M Ericsson (Publ) | Ejector assembly |
EP2768083A4 (en) * | 2011-10-11 | 2015-05-06 | Souriau Japan K K | Connector |
US9859654B1 (en) * | 2016-10-25 | 2018-01-02 | Eaton Corporation | Ejector mechanism for electrical assembly |
CN113028207A (en) * | 2021-02-26 | 2021-06-25 | 西安航远数字技术有限公司 | Novel quick-release display fixing structure for aviation simulator |
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Cited By (40)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6003689A (en) * | 1998-03-18 | 1999-12-21 | 3Com Corporation | PCB ejector cage assembly |
US6147872A (en) * | 1999-02-08 | 2000-11-14 | Excel Switching Corporation | Injector/ejector machanism for printed circuit cards |
US6160717A (en) * | 1999-02-24 | 2000-12-12 | Cisco Technology Inc. | Integrated retention spring with card ejector |
WO2001047331A1 (en) * | 1999-12-22 | 2001-06-28 | Rittal Electronic Systems Gmbh & Co. Kg | Operating element with on and/or off lever piece for printed circuit boards |
US6285548B1 (en) | 2000-08-18 | 2001-09-04 | Quantum Bridge Communications, Inc. | Face plate for a chassis for high frequency components |
US20020089821A1 (en) * | 2000-11-10 | 2002-07-11 | Acard Technology Corporation | Automated disk-ejection apparatus and disk array having the same |
US6836406B2 (en) * | 2000-11-10 | 2004-12-28 | Acard Technology Corporation | Automated disk-ejection apparatus and disk array having the same |
US20070236899A1 (en) * | 2001-02-05 | 2007-10-11 | Tellabs Petaluma, Inc. Delaware Corporation | Device for circuit board insertion-extraction |
US7243417B2 (en) * | 2001-02-05 | 2007-07-17 | Tellabs Petaluma, Inc. | Device for circuit board insertion and extraction |
US20040257784A1 (en) * | 2001-02-05 | 2004-12-23 | George Dalisay | Apparatus for circuit board insertion-extraction |
US6530802B2 (en) * | 2001-02-12 | 2003-03-11 | Berg Technology, Inc. | Latch and release mechanism for an electrical connector |
US6496379B2 (en) * | 2001-03-02 | 2002-12-17 | Sun Microsystems | PC board ejector assembly and method for use |
GB2379092A (en) * | 2001-08-10 | 2003-02-26 | Sun Microsystems Inc | Ejection/injection lever for computer module |
GB2379092B (en) * | 2001-08-10 | 2003-09-24 | Sun Microsystems Inc | Computer system module injection/ejection mechanism |
US7245632B2 (en) | 2001-08-10 | 2007-07-17 | Sun Microsystems, Inc. | External storage for modular computer systems |
US20030030993A1 (en) * | 2001-08-10 | 2003-02-13 | Kitchen James Robert | Module ejection mechanism |
US6980427B2 (en) | 2001-08-10 | 2005-12-27 | Sun Microsystems, Inc. | Removable media |
US6762934B2 (en) | 2001-08-10 | 2004-07-13 | Sun Microsystems, Inc. | Module ejection mechanism |
US20030048614A1 (en) * | 2001-08-10 | 2003-03-13 | Garnett Paul J. | Removable media |
US6912132B2 (en) | 2001-08-10 | 2005-06-28 | Sun Microsystems, Inc. | Support module ejection mechanism |
US20030031187A1 (en) * | 2001-08-10 | 2003-02-13 | Peter Heffernan | External storage for modular computer systems |
US6790068B2 (en) * | 2002-05-03 | 2004-09-14 | Hewlett-Packard Development Company, L.P. | Self-locking mechanism for a hot pluggable printed circuit board |
US20040106318A1 (en) * | 2002-05-03 | 2004-06-03 | Hewlett-Packard Development Company, L.P. | Self-locking mechanism for a hot pluggable printed circuit board |
US20030207605A1 (en) * | 2002-05-03 | 2003-11-06 | Compaq Information Technologies Group, L.P. | Self-locking mechanism for a hot pluggable printed circuit board |
US6669497B2 (en) * | 2002-05-03 | 2003-12-30 | Hewlett-Packard Development Company, L.P. | Self-locking mechanism for a hot pluggable printed circuit board |
US20040077198A1 (en) * | 2002-09-30 | 2004-04-22 | Schlack Richard E. | PC board ejector lever |
US20040219811A1 (en) * | 2003-04-29 | 2004-11-04 | International Business Machines Corporation | Apparatus for positioning an electrical assembly within a housing |
US6884096B2 (en) * | 2003-04-29 | 2005-04-26 | International Business Machines Corporation | Apparatus for positioning an electrical assembly within a housing |
US20040246695A1 (en) * | 2003-06-09 | 2004-12-09 | Schlack Richard E. | Compact PCI ejector latch |
US7397674B2 (en) | 2003-06-09 | 2008-07-08 | Southco, Inc. | Compact PCI ejector latch |
US7379303B2 (en) * | 2003-10-22 | 2008-05-27 | Hewlett-Packard Development Company, L.P. | Computing device module |
US20050088825A1 (en) * | 2003-10-22 | 2005-04-28 | Hewlett-Packard Development Company, L.P. | Computing device module |
US20050136715A1 (en) * | 2003-12-17 | 2005-06-23 | Schlack Richard E. | Ejector latch with double catch |
US6955550B2 (en) | 2003-12-17 | 2005-10-18 | Southco, Inc. | Ejector latch with double catch |
US20060050184A1 (en) * | 2004-09-09 | 2006-03-09 | General Instrument Corporation | Hot/cold swappable consumer based tuner/demod/fec module |
EP2768083A4 (en) * | 2011-10-11 | 2015-05-06 | Souriau Japan K K | Connector |
US9281616B2 (en) | 2011-10-11 | 2016-03-08 | Souriau Japan K.K. | Connector |
US20150016877A1 (en) * | 2012-04-25 | 2015-01-15 | Telefonaktiebolaget L M Ericsson (Publ) | Ejector assembly |
US9859654B1 (en) * | 2016-10-25 | 2018-01-02 | Eaton Corporation | Ejector mechanism for electrical assembly |
CN113028207A (en) * | 2021-02-26 | 2021-06-25 | 西安航远数字技术有限公司 | Novel quick-release display fixing structure for aviation simulator |
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